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<b>let </b><font color="Maroon">z</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K2">COMPLEX</a> ;<br/>

<b>assume </b><a NAME="E1:65"/><i><font color="Green">E21</font></i>: 
 <a href="complex1.html#K3" target="_self">Re</a> <font color="Maroon">z</font> <a href="hidden.html#R1">=</a> 0
 ;<br/>

<b>hence </b><font color="Maroon">z</font> <a href="complex1.html#K15" target="_self">*'</a>  = 
<span class="p1">(<span class="default"><a href="real_1.html#K1">-</a> 0</span>)</span> <a href="xcmplx_0.html#K2">+</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p3">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <font color="Maroon">z</font></span>)</span></span>)</span> <a href="xcmplx_0.html#K3">*</a> <a href="complex1.html#K7" target="_self">&lt;i&gt;</a> </span>)</span>

<br/>.= 
 <a href="complex1.html#K10" target="_self">-</a> <font color="Maroon">z</font>
<b>by </b><i><a class="ref" href="complex1.html#T15" target="_self">Th15</a>, </i>
;<br/><br/>


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